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Keloids

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Illustrations

Keloid above the ear
Keloid above the ear
Keloid, pigmented
Keloid, pigmented
Keloid, on the foot
Keloid, on the foot

Alternative Names    Return to top

Hypertrophic scar; Keloid scar; Scar - hypertrophic

Definition    Return to top

Keloids are an overgrowth of scar tissue at the site of a healed skin injury.

Causes    Return to top

Keloids occur from such skin injuries as surgical incisions, traumatic wounds, vaccination sites, burns, chickenpox, acne, or even minor scratches. They are fairly common in young women and African Americans. Keloids often run in families. Keloidosis is a term used when multiple or repeated keloids occur.

Most keloids will flatten and become less noticeable over a period of several years. They may become irritated from rubbing on clothing or other forms of friction. Extensive keloids may become binding, limiting mobility. They may cause cosmetic changes and affect the appearance.

Exposure to the sun during the first year of the keloid's formation will cause the keloid to tan darker than surrounding skin. This dark coloration may become permanent.

Symptoms    Return to top

A skin lesion that is:

The lesion may itch during formation and growth

Exams and Tests    Return to top

Diagnosis is made on the basis of the appearance of the skin or scar. A skin biopsy may be needed to rule out other skin growths (tumors).

Treatment    Return to top

Keloids often require no treatment. Keloids may be reduced in size by freezing (cryotherapy), external pressure, corticosteroid injections, laser treatments, radiation, or surgical removal. It is not unusual for keloids to reappear (sometimes larger than before) after they have been removed.

Discoloration from sun exposure can be prevented by covering the forming keloid with a patch or Band-Aid, and by using sunblockers when spending time in the sun. These extras protection measures should be continued for at least 6 months after injury or surgery for an adult, up to 18 months for a child.

Outlook (Prognosis)    Return to top

Keloids usually are not medically dangerous, but they may affect the cosmetic appearance. In some cases, they may spontaneously reduce in size over time. Removal or reduction may not be permanent, and surgical removal may result in a larger keloid scar.

Possible Complications    Return to top

When to Contact a Medical Professional    Return to top

Call your health care provider if keloids develop and removal or reduction is desired, or new symptoms develop.

Update Date: 10/16/2006

Updated by: Michael S. Lehrer, M.D., Department of Dermatology, University of Pennsylvania Medical Center, Philadelphia, PA. Review provided by VeriMed Healthcare Network.

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